A fund-raising letter has revealed one of the leading figures pushing for an investigation of alleged U.S. torture of terror suspects following 9/11: leftist billionaire-financier George Soros.

Officials at the Open Society Institute, which was founded by Soros in 1993 to promote progressive causes around the globe and which bills itself as “a Soros Foundation Network,” issued an e-mail to supporters yesterday announcing the creation of a new organization called the Commission on Accountability.

On its Web site, the Commission on Accountability demands an “independent, non-partisan” investigation of “torture and cruel, inhuman and degrading treatment of detainees.”

The Commission on Accountability asks for signatures on a petition to President Obama.

The petititon reads: “We call on the president of the United States to establish an independent, non-partisan commission to examine and report publicly on torture and cruel, inhuman, and degrading treatment of detainees in the period since September 11, 2001.

“The commission, comparable in stature to the 9/11 Commission, should look into the facts and circumstances of such abuses, report on lessons learned, and recommend measures that would prevent any future abuses.

The petition continues: “We believe that the commission is necessary to reaffirm America’s commitment to the Constitution, international treaty obligations, and human rights. The report issued by the commission will strengthen U.S. national security and help to re-establish America’s standing in the world.”

The roster of organizations supporting of The Commission on Accountability includes Amnesty International, The Carter Center, The Center for Victims of Torture, Human Rights Watch, and The Rutherford Institute.

It’s not the first time Soros’ fingerprints have been found on efforts to criminalize Bush-era decisions designed to keep America safe from terrorism.